our house is about 72-75 degrees any given time.How cold is cold?
Longer then you would think set up a heat lamp over a fireproof surface on the floor near to where he got out. Set up a water dish and some food. With any luck you will catch em. If u wanna get crazy if he is young and still on insects then let a dozen crickets go in the room! That should be great! Lol no I'd stick with the food and water dish and especially the heat lamp. Check for holes in the walls or cabinets that he may have crawled into.